Analysis

  • max time kernel
    150s
  • max time network
    139s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    11/01/2022, 22:55

General

  • Target
    a76b40c180ed7186fe866991a1cadd7b.xls
  • Size 118KB
  • Sample220111-2v4heaabbl
  • SHA256 71520c6b61c641945ab1d47dd755be9ecb8dfd171fa5daf9773a99459cb45efb
  • MD5 SHA1 SHA512

Malware Config

Extracted

Language
  • xlm4.0

Source
URLs
  • xlm40.dropper

    http://www.cuneytkocas.com/wp-content/VSnofpES1wO2CcVob/

  • xlm40.dropper

    http://towardsun.net/admin/BYGGkrYAnT/

Signatures

  • Emotet

    Emotet is a trojan that is primarily spread through spam emails.

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • suricata: ET MALWARE W32/Emotet CnC Beacon 3

    suricata: ET MALWARE W32/Emotet CnC Beacon 3

  • Blocklisted process makes network request 2 IoCs
  • Downloads MZ/PE file
  • Loads dropped DLL 2 IoCs
  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\a76b40c180ed7186fe866991a1cadd7b.xls
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1592
    • C:\Windows\SysWow64\rundll32.exe
      C:\Windows\SysWow64\rundll32.exe ..\sun.ocx,D"&"l"&"lR"&"egister"&"Serve"&"r
      2⤵
      • Process spawned unexpected child process
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1100
      • C:\Windows\SysWOW64\rundll32.exe
        C:\Windows\SysWOW64\rundll32.exe "C:\Users\Admin\sun.ocx",DllRegisterServer
        3⤵
        • Loads dropped DLL
        • Drops file in System32 directory
        • Suspicious use of WriteProcessMemory
        PID:1076
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Nhhjmhvsdhyfu\fyghwnoflfipd.ryl",ItuIVUQNcECMwQd
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1976
          • C:\Windows\SysWOW64\rundll32.exe
            C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Nhhjmhvsdhyfu\fyghwnoflfipd.ryl",DllRegisterServer
            5⤵
            • Blocklisted process makes network request
            • Suspicious behavior: EnumeratesProcesses
            PID:1780

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/1076-67-0x00000000009A1000-0x00000000009C3000-memory.dmp

        memory/1076-71-0x0000000002411000-0x0000000002433000-memory.dmp

        memory/1076-73-0x00000000024B1000-0x00000000024D3000-memory.dmp

        memory/1076-69-0x0000000002321000-0x0000000002343000-memory.dmp

        memory/1076-65-0x00000000002E1000-0x0000000000303000-memory.dmp

        memory/1100-57-0x00000000766D1000-0x00000000766D3000-memory.dmp

        memory/1100-61-0x00000000001B3000-0x00000000001B4000-memory.dmp

        memory/1100-60-0x0000000000191000-0x00000000001B3000-memory.dmp

        memory/1592-53-0x000000002F171000-0x000000002F174000-memory.dmp

        memory/1592-55-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/1592-54-0x0000000071BB1000-0x0000000071BB3000-memory.dmp

        memory/1780-81-0x0000000000161000-0x0000000000183000-memory.dmp

        memory/1780-83-0x0000000000341000-0x0000000000363000-memory.dmp

        memory/1780-85-0x00000000004D1000-0x00000000004F3000-memory.dmp

        memory/1780-87-0x0000000000BF1000-0x0000000000C13000-memory.dmp

        memory/1780-89-0x0000000002B51000-0x0000000002B73000-memory.dmp

        memory/1976-77-0x00000000001A1000-0x00000000001C3000-memory.dmp